A better question is what is the Wh rating of the Baseus 65W power bank. mAh is not a useful metric unless pack voltage is also known in order to calculate Wh. Wh is the total specific energy capacity of the battery. The fine print of the 65W Baseus charger notes that the 20,000 mAh is the total addition of the 4 individual cell mAh ratings. This is misleading because the Baseus likely uses 4 cells in series to make a ~15V nominal battery pack that is then fed into a boost converter after the USB-PD handshake confirms laptop pack voltage to be higher.
That was a tangent that isn't helpful. Here's the useful calculation: cells at a nominal voltage of 3.7V × 4 × 5Ah = 74Wh for the Baseus 65W Charger. This means you'll likely be able to charge the Framework's 55Wh battery one full time.
A better question is what is the Wh rating of the Baseus 65W power bank. mAh is not a useful metric unless pack voltage is also known in order to calculate Wh. Wh is the total specific energy capacity of the battery. The fine print of the 65W Baseus charger notes that the 20,000 mAh is the total addition of the 4 individual cell mAh ratings. This is misleading because the Baseus likely uses 4 cells in series to make a ~15V nominal battery pack that is then fed into a boost converter after the USB-PD handshake confirms laptop pack voltage to be higher.
That was a tangent that isn't helpful. Here's the useful calculation: cells at a nominal voltage of 3.7V × 4 × 5Ah = 74Wh for the Baseus 65W Charger. This means you'll likely be able to charge the Framework's 55Wh battery one full time.